var richtextTop = '<!doctype html><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8">' +
	'<meta http-equiv="X-UA-Compatible" content="IE=edge">' +
	'<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=0,viewport-fit=cover">' +
	'<title>测试</title><style>' +
	'* { padding:0; margin:0; }' +
	'html, body{width: 100%; height:100%;}' +
	'.test{height:100%;}' +
	'*::-webkit-scrollbar {width: 7px;height: 10px;background-color: transparent;}' +
	'*::-webkit-scrollbar-track {background-color: #f0f6ff;}' +
	'*::-webkit-scrollbar-thumb {background-color: #73abb1;border-radius: 6px;}' +
	'img{ max-width:100%; height:auto; }' +
	'a{ text-decoration: none; }' +
	'svg{position: absolute;}' +
	'iframe{ width: 100%;height:100%; }' +
	'</style></head><body>'+
	'<script src="/static/jquery/svg.js" type="text/javascript"><![CDATA[]]></script>'+
	'<script src="/static/js/svg-pan-zoom.js" type="text/javascript"><![CDATA[]]></script>'
var richtextBottom = '</body></html>'
let svgPath=''
